amsbsy – Produce bold math symbols (AMS-LaTeX)

The pack­age pro­vides a com­mand for pro­duc­ing bold math­e­mat­ics
sym­bols where ap­pro­pri­ate fonts ex­ist, and a ‘poor
man’s bold’ com­mand that can be ap­plied when no
ap­pro­pri­ate bold font is avail­able. The fa­cil­ity is avail­able
through the macro \boldsym­bol.